Rivet holder



' J. E. HOFFMAN RIVET HOLDER Filed-Nov. 28, 1924 2 Sheets-Sheet 1' E. Hbffman,

"April 13 1926.

r J. E. HOFFMAN RIVET HOLDER Filed Nov. -28, 19:24

2 Sheets-Shoot 2 Patented Apr. 13, 1926 UNITED STATES 1,581,059 PATENT OFFICE.-

JOHN E. 'HOFFMAMOF CASPER, WYOMING.,

RIVET HOLDEB.

Application filed November 28, 1924. Serial No. 752,651.

' and also to serve as a dolly during the upsetting of the rivet.

Another objectis to provide a novel construction wherein the rivet as it disengages the holder will immediately engage the dolly so as to avoid handling of the rivet.

Another object is to provide a novel construction of the ejecting or positioning means for the rivet.

S-ervient objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment. a

In said drawings Figure 1 is a view of the device in side elevation suggesting the rivet as engaged with the dolly;

Figure2 is a view of the parts of Figure 1 taken at a right angle thereto and looking at the front of the tool;

Figure 3 is a plan view of the tool;

Figure iis a fragmentary view showing the rivet positioning and ejecting parts in section and at a. right angle to Figure 2;

Figure 5 is a sectional view on the line 55 of Figure 4;

Figure 6 is a sectional View on the line 66 of Figure 1;

Figure 7 is a sectional View on 7-7 of Figure 1, and

Figure 8 is a sectional view on the line 8--8 of Figure 4.

In reducing the invention to practice, the tool has a stock 10 of any suitable metal, of any desired length, and constituting a dolly as at 11. The tool stock 10 has an offset magazine as at 12. The upper end of the magazine is preferably lower than the dolly and verges into the upper surface of the dolly through an inclined or cam surface 13. The bore of the magazine shown is open at the top and access thereto at the the line at 16 is further widen-ed or has lateral enportion '15 of said slot.

front of the tool is had through an elongated slot 14 leading downwardly from the top and the top is widened as at 15 and largement.

Slidable within the bore of the magazine is a rivet holder cage 17 which may have a base wall 18 with relatively narrowarms 19 rising therefrom and in spaced relation and which arms have inturned flanges 20 I at their upperends. A follower disk 21 is slidably disposed Within the holder 17 and urged toward the flanges 20 by means of an expansive coil spring 22 engaging the 7 base wall 18 and the follower 21.

As a result of the construction described,

a rivet such as that suggested at a in Figures 1 and 2 may be inserted into the holder by passing its head through the enlargement 7 16of the slot 14; and its shank through the This rivet is inserted through the slot manually with its head intermediate the flanges 20 and follower 21 as shown particularly in Figure 5 where it is held in place against accidental displacement by the head 21 under urgency of the expansive spring 22. The holder 17 is adapted to be elevated so that the rivet held thereby may be applied t the work and as suggested in Figure 1.

To the end last stated, a rack bar 23 is integral with the holder 17 and depends therefrom. Said rack bar 23 has teeth 24 in mesh with the teeth of a pinion 25 which is journaled o-n'afixed stub shaft 26 bridging the magazine as best shown in Figure 5. The pinion25 is turned by a depressible rack bar 26 whose teeth 27 mesh with those of the pinion 25. engagement with the under surface of wall 18 and is adapted to be depressed by a thumb plate or the like 28 integral with bar 26 and projectin outwardly through and 1 This bar is normally in The other end of bar turns the pinion 25 and the latter through its engagement with rack bar 23 elevates bar 23 and accordingly the holder 17, against tension of the spring 29. The elevation of holder 17 is sufficient for pro jection of the rivet above the magazine. WVhen the rivet is in such position, it may be engaged in the opening-to receive the same by projecting the shank thereinto and as suggested in Figure '1, after which the tool may bedrawn toward the operator which will result in the release of the rivet by the'flanges 20 and engagement of the head of the rivet with the surface 13 and the dolly 11 which will serve to hold the rivet in place and position it with respect to the dolly 11 after which the shank of the rivet may be upset in the usual manner. After the rivet has been released, the parts will be restored to normal position or retractedby the spring 29.

It is obvious that the tool is capable of use in all relations where riveting is resorted to and for instance'in the construction of roofs, the fastening of the bottoms, or walls of oil tanks, metal ship decks and otherwise. 7

Various changes may be'resorted to provided they fall within the spirit and scope of the invention. I

What is claimed is 1. A rivet tool having a rivet holder adapted for projection to position the rivet,

a bar depending from the holder, a magazine containingthe holder, a guide disk at the base of said bar disposed in said magazine, a retractile spring secured to said disk and to the magazine to urge the holder to retracted position, a depressible bar normally in engagement with the holder, and a drive connection between said last mentioned bar and the first mentioned bar.

2; A rivet tool having a rivet holder adapted for projection to position the rivet, a bar depending frointhe holder, a magazine containing the holder, a guide disk at the base of said bar disposed in said magazine, a retractile spring secured to said disk and to the magazine to urge the holder to retracted position, a depressible bar normally in engagement with the holder, and a drive connection between said last mentioned bar and the first mentioned bar, said holder comprising spaced arms having rivet retaining flanges thereon, a follower between said arms engageable with a rivet head, an expansive spring urging the follower toward said flanges, and a dolly on the tool for engagement with the rivet after release by the holder.

" In testimony whereof I aflix my signature.

JOHN E. HOFFMAN. 

